Added virtual destructors to VertexArrayImpl and BufferImpl Change-Id: Ib9d8b2fc85b63f0cd52a2b19129a88ba7acbc017 Reviewed-on: https://chromium-review.googlesource.com/209380 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Nico Weber <thakis@chromium.org> Tested-by: Nico Weber <thakis@chromium.org>